attribute vec4 vPos; 
attribute vec3 vNormal; 
attribute vec2 vTexCoord; 
varying vec2 texcoord;
uniform mat4 mvMatrix;
uniform mat4 mvpMatrix;
uniform mat3 normalMatrix;
//uniform vec4 lightPos;
void main (void) 
{ 
  gl_Position = mvpMatrix * vPos;
  texcoord=vTexCoord;
}

